Elements, Mixtures
&
Compounds
&
Compounds
Chemical Equations
Particle Diagrams
Law of Conservation of Mass
More LCOM
100
The smallest unit of matter which has properties of a chemical element.
What is an atom?
100
These are the ingredients of a reaction; they are on the left side of the arrow.
What are reactants?
100
Which represents a compound?
What is B?
100
Is this chemical equation balanced?
NaCHO3 + 3HC2H3O2 ---> NaC2H3O2 + 3H2O + CO2
What is not balanced?
100
Anything that has mass and takes up space?
What is matter?
200
Carbon & oxygen combine chemically to form carbon dioxide. What is carbon dioxide?
What is a compound?
200
These are the end results of a reaction; they are on the right side of the arrow.
What are products?
200
Which number represents as element?
What is number 2?
200
In a ____________ system, all the matter stays inside.
What is closed?
200
Matter can not be created nor destroyed: it can only be?
What is transformed or changed?
300
Oxygen is what kind of matter?
What is an element
300
The symbolic representation of a chemical reaction using symbols and chemical formulas.
What is a chemical equation?
300
What is this particle diagram showing?
What are elements?
300
If reaction starts with 20g of reactants it should produce?
What is 20g of products?
300
Draw the molecule below:
What is....?
400
Soil and air are examples of what type of mixtures? (answer in the correct order)
What are heterogeneous and homogeneous mixtures.
400
The large number in front of a molecule is called the ________. It tells us the number of molecules in an equation.
What is coefficient?
400
What is this particle diagram showing?
What is a mixture of compounds?
400
Is this equation balanced or unbalanced?
What is balanced?
400
If a container does NOT have a lid, it is called a what system?
What is open?
500
What's the difference between an element and a compound?
What is elements cannot be broken down into simpler substances, while compounds can.
500
The number placed after a symbol in a chemical reaction is
What is a subscript?
500
What is this particle diagram showing?
What is a mixture of elements and compounds?
500
What happens to the total mass of the substances after a chemical reaction?
What is stays the same?
500
To follow LCOM, there should be the same number of ____ for each element on both sides of the equation.
What is atoms?